Answer:
20.0928.
Explanation:
The average atomic mass is (90 * 19.992 + 10* 21) / 100
= 20.0928.
The average atomic mass will be 20.0928.
What do you mean by the atomic mass of an element ?
Atomic mass, which is also known as atomic weight, is the average mass of atoms of an element, calculated using the relative abundance of isotopes in a naturally occurring element.
The mass is the sum of the mass of all the protons, neutrons, and electrons in an atom.
To calculate the average atomic mass-
Neon =90 ,atomic mass=19.992 a.m.u
For another,
Neon=10,atomic mass=21 a.m.u
= (90 * 19.992 + 10* 21) / 100
Therefore, average atomic mass will be 20.092.
Learn more about atomic mass ,here:
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